buffer: proper API export for Windows

So that Windows users can properly include smalloc and node_buffer,
NODE_EXTERN was added to the headers that export this functionality.

src/node_buffer.h

@@ -19,6 +19,7 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+#include "node.h"
 #include "smalloc.h"
 #include "v8.h"
 
@@ -31,29 +32,29 @@ namespace Buffer {
 
 static const unsigned int kMaxLength = smalloc::kMaxLength;
 
-bool HasInstance(v8::Handle<v8::Value> val);
-bool HasInstance(v8::Handle<v8::Object> val);
-char* Data(v8::Handle<v8::Value> val);
-char* Data(v8::Handle<v8::Object> val);
-size_t Length(v8::Handle<v8::Value> val);
-size_t Length(v8::Handle<v8::Object> val);
+NODE_EXTERN bool HasInstance(v8::Handle<v8::Value> val);
+NODE_EXTERN bool HasInstance(v8::Handle<v8::Object> val);
+NODE_EXTERN char* Data(v8::Handle<v8::Value> val);
+NODE_EXTERN char* Data(v8::Handle<v8::Object> val);
+NODE_EXTERN size_t Length(v8::Handle<v8::Value> val);
+NODE_EXTERN size_t Length(v8::Handle<v8::Object> val);
 
 // public constructor
-v8::Local<v8::Object> New(size_t length);
+NODE_EXTERN v8::Local<v8::Object> New(size_t length);
 // public constructor from string
-v8::Local<v8::Object> New(v8::Handle<v8::String> string);
+NODE_EXTERN v8::Local<v8::Object> New(v8::Handle<v8::String> string);
 // public constructor - data is copied
 // TODO(trevnorris): should be something like Copy()
-v8::Local<v8::Object> New(const char* data, size_t len);
+NODE_EXTERN v8::Local<v8::Object> New(const char* data, size_t len);
 // public constructor - data is used, callback is passed data on object gc
-v8::Local<v8::Object> New(char* data,
+NODE_EXTERN v8::Local<v8::Object> New(char* data,
                                       size_t length,
                                       smalloc::FreeCallback callback,
                                       void* hint);
 
 // public constructor - data is used.
 // TODO(trevnorris): should be New() for consistency
-v8::Local<v8::Object> Use(char* data, uint32_t len);
+NODE_EXTERN v8::Local<v8::Object> Use(char* data, uint32_t len);
 
 }  // namespace Buffer
 

src/smalloc.h

@@ -22,6 +22,7 @@
 #ifndef NODE_SMALLOC_H_
 #define NODE_SMALLOC_H_
 
+#include "node.h"
 #include "v8.h"
 
 namespace node {
@@ -38,19 +39,19 @@ namespace smalloc {
 // mirrors deps/v8/src/objects.h
 static const unsigned int kMaxLength = 0x3fffffff;
 
-typedef void (*FreeCallback)(char* data, void* hint);
+NODE_EXTERN typedef void (*FreeCallback)(char* data, void* hint);
 
 /**
  * Allocate external memory and set to passed object. If data is passed then
  * will use that instead of allocating new.
  */
-void Alloc(v8::Handle<v8::Object> obj, size_t length);
-void Alloc(v8::Handle<v8::Object> obj, char* data, size_t length);
-void Alloc(v8::Handle<v8::Object> obj,
+NODE_EXTERN void Alloc(v8::Handle<v8::Object> obj, size_t length);
+NODE_EXTERN void Alloc(v8::Handle<v8::Object> obj, char* data, size_t length);
+NODE_EXTERN void Alloc(v8::Handle<v8::Object> obj,
                        size_t length,
                        FreeCallback fn,
                        void* hint);
-void Alloc(v8::Handle<v8::Object> obj,
+NODE_EXTERN void Alloc(v8::Handle<v8::Object> obj,
                        char* data,
                        size_t length,
                        FreeCallback fn,
@@ -60,7 +61,7 @@ void Alloc(v8::Handle<v8::Object> obj,
  * Free memory associated with an externally allocated object. If no external
  * memory is allocated to the object then nothing will happen.
  */
-void AllocDispose(v8::Handle<v8::Object> obj);
+NODE_EXTERN void AllocDispose(v8::Handle<v8::Object> obj);
 
 }  // namespace smalloc